MG-Rover.org Forums banner
1 - 20 of 41 Posts

·
Registered
Joined
·
459 Posts
Discussion Starter · #1 ·
Hope those of you who went to Beaulieu had a great day!

I am trying to decide on a Rover Ron TU3, TU3a, or TU4 'Synergy' tuning module for my CDT. Can any one help with which choice is best, and is there any benefit (apart from compactness) from having the TU4 over separate TU3a and MAFM units at the same total price?
 

·
Registered
Joined
·
11 Posts
Hi, I reckon it's really down to personal choice, your cars mileage and what your mafs like. I went for a synergie so that i could just switch in the mafam when the maf started to deteriote (around 30-45k mile according to Rover Ron) rather than buy another box and connecting it up at a later date. That said, even tho my cars only done 19K and the mafam should still be good the difference in performance is incredible :scary: with the mafam switched in, so it must have been deteriorating even tho it was not noticeable. imho Rons a genius and the synergie unit is the absolute best one box solution available.:bgrin:
 

·
Registered
Joined
·
459 Posts
Discussion Starter · #3 ·
Ive had my 75 for 6 months, its now done 76,000, I have no history, never driven another, so have nothing to compare it with.
Probably the best bet is to get a synergy and see how I feel about it. Rover Ron offers a money back guarantee if not satisfied anyway.
 

·
Registered
Joined
·
2,322 Posts
Get the synergy unit - you have all bases covered then! Unless you MAF has been replaced at 76K it will need the help of the MAFAM too.
 

·
Registered
Joined
·
5,472 Posts
doublekite said:
Come on you lot, someone must have one!
Yes lots do, why don't you search for and read all the other threads (all positive) as the benefits of Rons boxes have been discussed here a lot of times so no neeed to do it all again
 

·
Registered
Joined
·
459 Posts
Discussion Starter · #7 ·
Ive seen lots on the TU3b but the TU4 is fairly new, and I cannot recall seeing much, if anything about it. Could you direct me please?
 

·
Registered
Joined
·
5,472 Posts
Youre right previous threads were TU3 based but I am sure I have seen a bit relating to the TU4 here somewhere, I think I asked what the difference was myself a couple of weeks ago somewhere, I will have a look through
 

·
Registered
Joined
·
2,322 Posts
The TU4 or synergy as its called is basically a TU3b with a digital MAFAM built in. The MAFAM is used to compensate for old MAF's

So everything you have read about the TU3b applies to the TU4 but it has the MAFAM as well.
 

·
Registered
Joined
·
32 Posts
had my 02 mg zt cdti for about 2 weeks before i ordered a tu4 from Ron
it suffered from poor pick until higher speeds and stalled frequently from setting off at junctions unless it was booted
took me about an hour to fit the unit and the remote switch
i then had a play around to get the right setting
what an improvement
i have had it fitted now for about 4 weeks and havnt looked back
my car is now a pleasure to drive
turbo now cuts in at low revs and now actually feels sporty :eek:)
(you can now red line it if you wanted)
i would recommend the extension switch though,saves you lifting the bonnet every time (you have 3 settings that can be made from inside the car
1. all off 2.economy setting 3. your setting) but these can not be changed while the car is running
once again a Big thanks to Rover Ron for this mod
my advice is get it you wont regret it :eek:)
 

·
Registered
Joined
·
45 Posts
No one in these continuing threads has mentioned Insurance premium increases, I have a W 75Conn se and although I am with Saga at the moment, I expect that if I had the mods(Roveron) my premium will be far too high to enjoy the car.
Rover 75 fans .. what insurance company do you use if you say mods fitted??..
 

·
Registered
Joined
·
5,472 Posts
COMET said:
No one in these continuing threads has mentioned Insurance premium increases, I have a W 75Conn se and although I am with Saga at the moment, I expect that if I had the mods(Roveron) my premium will be far too high to enjoy the car.
Rover 75 fans .. what insurance company do you use if you say mods fitted??..
It has been mentioned many times before

I have declared a Tuning Box, Navigation mods and Different wheels I am with Admiral their quote was still cheaper than several others with the car in standard trim

Ironicaly it was the Navigation system that added a bit to the premium because of the obscene cost to replace it (if you bought the parts new it would be nearly £4000)!

Not everyone will be telling the insurance companies though and that is their choice and no I am sure they don't need reminding of the consequences.

That is a topic for the general forums not a model specific one such as here
 

·
Registered
Joined
·
298 Posts
COMET said:
No one in these continuing threads has mentioned Insurance premium increases, I have a W 75Conn se and although I am with Saga at the moment, I expect that if I had the mods(Roveron) my premium will be far too high to enjoy the car.
Rover 75 fans .. what insurance company do you use if you say mods fitted??..
I have a ZT-T 131 the box increased my premiums from £310 to £390. It would be very easy not to declare it, but the implications of having a serious accident and it being found by the loss adjuster and having your insurance cancelled isn't really worth the risk.

I am with Adrian Flux insurance, cheaper than through Confused.com, Insurancesupermarket.com and Tescos even after having the box added.
 

·
Registered
other_manufacturer
Joined
·
4,589 Posts
Dyno Figures

I eventually made time to take the car back to Star Performance's rolling road.

The results are good, bearing in mind the air temp was quite a bit warmer than when I had it tested in November.

All are correctd engine power toDIN 70020. Air press 1023mbar, air temp 19C.

A) MAF ON TU3 ON SETTING 6 148.5BHP @ 4020 229LBS [email protected] 2380.

B) MAF ON TU3 ON SETTING 9 145BHP 229LBS FT

C) MAF ON H TU3 OFF 113BHP @ 3760 192LBS FT @ 2580

D) MAF OFF TU3 OFF [email protected] 3820 182LBS FT @ 3170

So I'm slightly disappointed at not cracking 150bhp, but on a cooler day it probably would have happened.

On setting 9 there was visible smoke (thouigh not clouds of it) all the way to max revs.
Clearly it was enough to reduce the power slightly, since the highest reading was on setting 6 (med maf, med/high power). There was only a feint sign of smoke on this setting.

Increasing the boost 2-3psi would no doubt clean up the exhaust a bit and crack the 150bhp threshold as it looks like more air is needed even with the intake mod & BMC filter.

I will put the charts on my website asap.

Ron

Spec: Pierburgh maf, Synergy, BMC air filter, cleaned egr valve, intake mod. Shell Extra + Millers DPP, Millers XFG fully synthetic oil. Mileage 100100.
 

·
Registered
Joined
·
459 Posts
Discussion Starter · #20 ·
Insurance

Sorry to disagree Keith, but as we are specifically discussing the 75/ZT with TU4. I think it is OK to discuss premiums as we could all benefit from others knowledge.
What do others think?
How can just having the MAFM on affect premiums as it only compensates for a worn part.
 
1 - 20 of 41 Posts
Top